To be performed during oral sex.
At the point of climax, the male being given fellatio removes his penis and ejaculates onto the upper lip of his partner, giving her a thick jizz mustache; much like that of Wilford Brimley.

Last night while receiving head from the hooker I solicited, I pulled out and gave that Ho a Wilford Brimley. Ironically enough she has Diabeetus.